Implement core Error for PldmError and mctp::Error

core::error was added in Rust 1.81.

Signed-off-by: Matt Johnston <[email protected]>

Author: mkj

mctp/src/lib.rs

@@ -190,8 +190,7 @@ pub enum Error {
     Io(std::io::Error),
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for Error {}
+impl core::error::Error for Error {}
 
 impl core::fmt::Display for Error {
     fn fmt(&self, fmt: &mut core::fmt::Formatter) -> core::fmt::Result {

pldm/src/lib.rs

@@ -50,9 +50,8 @@ impl core::fmt::Display for PldmError {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for PldmError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+impl core::error::Error for PldmError {
+    fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {
         match self {
             Self::Mctp(s) => Some(s),
             _ => None,